Jewel Cichlid Care Guide

The jewel cichlid earns its name - emerald-to-crimson bodies dusted with rows of electric-blue spangles - and it also earns its reputation as a community-tank wrecker. It is hardy and easy to keep, but territorial all year round and savagely aggressive when breeding, when it will hunt, bully and kill virtually any tankmate it can catch. It is a confirmed piscivore, not a peaceful centrepiece, and best kept as a species or pair tank. One more catch: the "jewel cichlid" in your shop is probably not the species on the label - more on that below.

Jewel Cichlid at a glance

The sourced figures the welfare engine uses to judge Jewel Cichlid — the parseable key facts.

Where it comes from

Jewels are African riverine cichlids from West and Central Africa - widely distributed across West African basins, with the classic bimaculatus range running from southern Guinea to central Liberia, plus records into Cameroon, the Congo and the Nile basin. They are benthopelagic fish of small streams, rivers and canals with overhanging and surface vegetation, over mud and sand, and they even tolerate some brackishness in coastal lagoons. That structured, vegetated habitat is why a tank wants caves, rocks, roots and sightline breaks: they let a pair claim a defendable territory, which reduces - but never removes - the aggression. The mud-and-sand origin means a sand or fine-gravel bottom they can dig, especially before spawning. Most usefully for the buyer, their wide natural water-quality tolerance is exactly why they are genuinely hardy and adaptable, and exactly why beginners buy them and then cannot house their temperament.

Did you know?

• FishBase calls H. bimaculatus "the true jewel fish of aquarists" - even though taxonomists and importers agree the fish in shops is usually its near-identical sibling, H. guttatus.
• It blushes blood-red to breed: the body, especially the female's, flushes from drab to brilliant crimson in spawning condition, a courtship signal rather than a sign of distress.
• Both parents guard, fan and herd up to around 600 fry as a shoal for about a month - among the most devoted biparental care in freshwater fish.
• It is a classic laboratory animal, used in animal-behaviour research for its bold, stereotyped aggression and parental displays.
• The misidentification runs literature-deep: feral jewel populations in Florida were filed as H. bimaculatus for decades before being reidentified as H. letourneuxi or hybrids.

Tank size — and why

Around 30 US gallons is the widely-cited floor for a single pair, but read that as a footprint figure, not a volume one: Seriously Fish specifies a 120 cm (four-foot) long tank, so length and floor area matter more than the gallon count. The moment you add tankmates or the pair starts breeding, 30 gallons is too tight - 50-55 gallons or more is the recommendation, adding roughly 20 gallons per extra pair. The extra space is aggression management, not bioload: a spawning pair tries to own the whole tank, and victims need refuge and escape routes or the aggression turns lethal. That said, the bioload is real too - a big, meaty-feeding carnivore needs strong filtration and regular water changes.

Keep a single Jewel Cichlid — its own kind fight, so the answer is one regardless of tank size, with non-rival tankmates added only in a larger, planted tank.

How big does it really get?

Full-grown Jewel Cichlid reach about 14 cm (5.5 in) long, but they are usually sold at only about 3 cm (1.2 in) — a typical shop size (estimate). At full size, Jewel Cichlid needs roughly a 30-gallon tank, about 76 cm long; a common 10-gallon starter kit is only about 51 cm.

Adult size is sourced; the shop size is a typical-juvenile estimate; tank length is approximate for a standard 30-gallon aquarium.

Water parameters in practice

This is not a delicate fish. Aim for roughly 24-27 C and a near-neutral pH of about 6.5-7.5 in soft-to-medium-hard water, but the tolerated band is wide - sources span about 21-28 C and pH 6.0-7.8, and the fish forgives parameter swings far better than a ram or discus. FishBase's wild figures sit at the cool end (21-23 C); most hobby keepers run them a touch warmer. The real husbandry challenge is not hitting an exact number, it is keeping up with the waste of a heavy-feeding carnivore - so prioritise stable, clean water and a strong filter over chasing precise parameters.

Diet & feeding

In the wild the jewel is a carnivore - FishBase puts it at a firmly piscivorous trophic level of 3.9, taking insects, invertebrates and small fish. In the tank it behaves as an unfussy omnivore that will eat nearly anything offered: run a quality cichlid pellet as the base, supplemented with frozen or live bloodworm, brine shrimp, daphnia, mysis and chopped meaty foods, with some vegetable matter too. Live and meaty foods deepen the red and blue colour. The load-bearing point for stocking is behavioural: this is an aggressive, confident feeder that actively hunts and eats fish small enough to swallow, which is why its tankmate list has to be size-screened and why small fish and shrimp are simply food.

Gear & setup

Give it a sand or fine-gravel bottom it can dig, with rocks, caves, flat stones for spawning sites, driftwood and dense structure to break up sightlines - the more a pair can claim and defend a territory, the less it spills aggression across the whole tank. Use hardy, attached plants such as anubias or java fern, since pre-spawn digging will uproot loose plantings. Keep the tank covered; like most cichlids they jump, especially when chased. Filtration should be strong for a big carnivore's bioload, with regular water changes; moderate flow is fine.

Temperament & behaviour

The jewel is an aggressive, highly territorial substrate-spawning cichlid - Seriously Fish flatly says it is not recommended for the beginner or the general community tank, despite often being sold as such. It is territorial and pugnacious even outside breeding (FishBase tersely lists its behaviour as "aggressive; in pairs"), and when a pair forms and spawns it becomes incredibly aggressive, claims the whole tank and will not tolerate other fish in it. That is the single most important welfare fact about the species: a peaceful tank can be devastated overnight when a pair decides to breed. Temperament is partly individual - some specimens are reportedly more sociable than others - but the only safe assumption is the aggressive one. Conspecific aggression is severe: two jewels that are not a bonded pair, and especially two males, will fight, and even bonded pairs can turn on each other.

Group & social needs

Keep a single fish or one self-selected bonded pair - never a group, and never two unpaired jewels in a small tank. You cannot reliably force-pair two adults; the usual route is to grow out a group of juveniles, let a pair self-select, and remove the rest. A bonded pair is also the trigger for the breeding aggression that empties a community, so a single fish is the lowest-drama option.

Compatible tank mates (preview)

The engine clears no fish into a clear top set with Jewel Cichlid. It is not a species you can stock from a generic "peaceful community" list — shrimp, snails and small community fish are not safe defaults with it, so work from the temperament and tank-mate guidance in the sections above (and the full compatibility checker) rather than a quick shortlist.

This engine-cleared shortlist is Jewel Cichlid's tankmate surface for now — a dedicated tank-mates guide can follow for high-demand species.

Breeding & sexing

Breeding is easy - jewels form pairs and spawn readily - the hard part is everything else, namely housing the aggression and the tank wipe-out that follows. Correct a common error first: this is a substrate spawner, not a mouthbrooder. Some care pages call jewels "mouth brooders," but FishBase, Seriously Fish and Wikipedia all describe open-substrate spawning, with eggs laid on a cleaned flat stone, slate or leaf and tended in the open. Sexing is difficult outside breeding condition: males tend to be larger with more pointed dorsal and anal fins and more reticulated, net-like blue patterning on the fins, while females in condition flush a rounder body and a more intense red - but the cues overlap. A slight warm-up (around 27-28 C) and a good varied diet trigger spawning; clutches are large, with sources citing up to about 500-600 eggs. Eggs hatch in roughly 48 hours and fry are free-swimming after about 72 hours, after which both parents guard, fan and shepherd the fry as a shoal for around a month - exemplary biparental care that is exactly what makes a breeding pair so dangerous to everything else in the tank.

Lifespan

Around five years is typical, with five to seven achievable on good care and up to about ten reported but uncommon. They are hardy and disease-resistant with no famous species-specific syndrome, so longevity is usually limited by the husbandry of their temperament rather than fragility - chronic stress from overcrowding or fighting in tanks too small for their territoriality, poor water quality from the high bioload, and injuries from aggression are what cut a jewel's life short.

Common mistakes

• Buying it as a peaceful community fish. It is often sold as one but is not recommended for the general community tank; it will eventually empty it.
• Underestimating breeding aggression. A jewel can be "fine" for months, then pair, spawn and kill everything. Plan for that from day one.
• Stocking small or peaceful fish, or shrimp. They are a confirmed piscivore and these become food.
• Using too small a tank. Thirty gallons is the floor for a pair and is too tight once breeding starts - with no refuge, victims get injured or killed.
• Assuming the label is the species. You are probably buying H. guttatus or a hybrid, not true H. bimaculatus, so do not breed "for the species" assuming purity.
• Calling it a mouthbrooder. It is a substrate spawner; a few care pages get this wrong.

Signs of trouble

• Loss of the bright red colour - fading or darkening - plus clamped fins and hiding, signalling stress, often from being bullied or from poor water.
• A tankmate cowering in corners, with torn fins or wounds - the jewel is harassing or attacking it; rehouse the victim.
• Refusing food and rapid gilling - check water quality first.
• White spots (ich), head pits (hole-in-the-head) or fin rot - the usual water-quality- and stress-driven cichlid ailments rather than a fragile species.
• Two jewels locking up and fighting - usually two unpaired fish, or a pair with too little space for a rival to retreat.

Is this fish right for you?

Do not buy a jewel cichlid if you want a community centrepiece, if you keep small or peaceful fish or shrimp (they are eaten or killed), if you have only a small or standard tank, or if you want a fish you can mix freely - a spawning pair is effectively incompatible with all tankmates. Do buy it if you want a brilliant, hardy, characterful species or pair display and can house its temperament. On identity, buy with eyes open rather than for purity: the fish sold as "jewel cichlid" is a species complex, and most "red jewels" in the trade are actually H. guttatus or a hybrid rather than true H. bimaculatus, with what is sold as lifalili usually selectively-bred guttatus or crosses too. That is fine for a pet, but it means the trade is a hybrid swarm and the name on the tank is best treated as approximate.

Common questions

Is the jewel cichlid aggressive?

Very. It is territorial and pugnacious even outside breeding, and when a pair spawns it becomes incredibly aggressive, claims the whole tank and will not tolerate other fish. It is not recommended for the general community tank despite often being sold as one.

Can jewel cichlids live in a community tank?

Not safely. They are confirmed piscivores that eat fish small enough to swallow and bully or kill those they cannot, and a breeding pair is effectively incompatible with all tankmates. The best setup is a species or pair tank; only large, fast, robust fish in a big aquarium stand any chance, and even then expect to remove them if a pair forms.

Are jewel cichlids mouthbrooders?

No - this is a common error. Jewels are substrate spawners that lay eggs on a cleaned flat stone, slate or leaf and tend them in the open, with both parents guarding the fry. FishBase, Seriously Fish and Wikipedia all describe open-substrate spawning; a few care pages wrongly call them mouthbrooders.

What is the real species of a jewel cichlid?

It is genuinely contested. The trade "jewel cichlid" is a species complex, and the fish sold is usually H. guttatus or a hybrid rather than the true H. bimaculatus, which importers say is very rare in the hobby. What is sold as lifalili is usually selectively-bred guttatus or a cross too. Treat the name on the tank as approximate.

How big do jewel cichlids get and how long do they live?

Around 13-15 cm (5-6 in), with many traded fish maturing a little smaller at 10-13 cm, and they live roughly five years, up to seven on good care and occasionally about ten.

Sources & confidence

Sources & confidence (1 species)

These back the Jewel Cichlid figures and the previewed tank mates above. Each figure is read from the TankStocking species database (v2026.06); below is the care reference behind it and how confident we are in that data. Confidence reflects the source quality, not whether any pairing is safe. Full source list and the welfare model are on the methodology page.

• Jewel Cichlid Hemichromis bimaculatus — Seriously Fish (seriouslyfish.com/species/hemichromis-bimaculatus); Aquariadise high confidence

Care-guide sources (6)

This guide synthesises the references below; where they disagree, the range and the disagreement are noted in the text above. The figures in the key-facts box are read from the TankStocking species database (v2026.06). Full welfare model on the methodology page.

• FishBase - Rubricatochromis bimaculatus (Gill, 1862)
• Seriously Fish - Hemichromis bimaculatus
• Aquariadise - Jewel Cichlid (Hemichromis bimaculatus) Care Sheet
• Wikipedia - Jewel cichlid
• Aquarium Glaser - Rubricatochromis "lifalili" (formerly Hemichromis)
• AquariumStoreDepot - How to Care for a Jewel Cichlid

More on Jewel Cichlid

Related guides on TankStocking — each scored by the same welfare engine as the planner.

This care guide is a sourced planning reference, not veterinary advice — individual fish, filtration and maintenance all matter. Cycle the tank, test your water, and observe your fish. How TankStocking works →